Patent US4559315A successfully refreshed from Google Patents.
US4559315A
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Zeolite modification
Assignee: Mobil Oil AS
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Filing: 1984-07-16
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Granted: 1985-12-17
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Expires: 2004-07-16
Abstract
Abstract The ion-exchange capacity and acid catalytic activity of a ZSM-5 type zeolite are increased by treatment of a physical mixture of the zeolite and an inorganic oxide with water in the presence of an alkali metal cation.
Inventors
- 👤 Clarence D. Chang
- 👤 Joseph N. Miale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:57
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/70; B01J29/7007; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/36; B01J2229/42
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
85 words
A method for modifying a composition to increase its acid catalytic activity, said composition comprising a physical mixture of a ZSM-5 type zeolite and a solid source of aluminum, which method comprises: contacting said mixture with liquid water in the presence of an activating amount of an alkali metal cation and under a combination of conditions including a temperature up to about 370° C. for less than about 1 hour to about 100 hours, said combination of conditions being effective to induce said increased activity.
Claim 2
Independent Claim
85 words
A method for modifying a composition to increase its acid catalytic activity, said composition comprising a physical mixture of a ZSM-5 type zeolite and a solid source of aluminum, which method comprises: contacting said mixture with liquid water in the presence of an activating amount of an alkali metal cation and under a combination of conditions including a temperature up to about 370° C. for less than about 1 hour to about 100 hours, said combination of conditions being effective to induce said increased activity.
Claim 3
Dependent Claim
17 words
The method described in claim 1 wherein said solid source of aluminum is present as discrete particles.
Claim 4
Dependent Claim
17 words
The method described in claim 1 wherein said liquid water is present as a continuous liquid phase.
Claim 5
Dependent Claim
62 words
The method described in claim 3 wherein said alkali metal cation is furnished by a compound dissolved in said water and selected from the group consisting of an alkali metal hydroxide, an alkali metal salt of a weak acid having a dissociation constant less than about 10 -4 , and mixtures thereof, said solution having a pH of at least about 7.
Claim 6
Dependent Claim
16 words
The method described in claim 4 wherein said source of aluminum is present as discrete particles.
Claim 7
Dependent Claim
18 words
The method described in claim 4 wherein said source of aluminum is present as binder for said zeolite.
Claim 8
Dependent Claim
15 words
The method described in claim 4 wherein said alkali metal is lithium, sodium or potassium.
Claim 9
Dependent Claim
16 words
The method described in claim 7 wherein said weak acid is acetic, carbonic or phosphoric acid.
Claim 10
Dependent Claim
60 words
The method described in claim 4 wherein said alkali metal cation is furnished as a solution of lithium, sodium or potassium hydroxide in said water at a concentration of 0.001 to about 1 molar, said temperature is above 0° C. up to about 170° C., and said treatment time is less than about 1 hour up to about 24 hours.
Claim 11
Dependent Claim
23 words
The method described in claim 4 wherein said solution is adjusted to a pH of 7 to about 12 before said contacting step.
Claim 12
Dependent Claim
23 words
The method described in claim 4 wherein said contacting step is conducted at a temperature of about 10° C. to about 100° C.
Claim 13
Dependent Claim
22 words
The method described in claim 4 wherein said zeolite is ZSM-5 having a silica to alumina ratio of at least about 100.
Claim 14
Dependent Claim
40 words
The method described in claim 4 wherein said zeolite is ZSM-5 having a silica to alumina ratio of at least 70:1, and said combination of treatment conditions is effective to decrease said silica to alumina ratio to less than 60:1.
Claim 15
Dependent Claim
11 words
The method described in claim 1 wherein said zeolite is ZSM-5.
Claim 16
Dependent Claim
11 words
The method described in claim 2 wherein said zeolite is ZSM-5.
Claim 17
Dependent Claim
11 words
The method described in claim 3 wherein said zeolite is ZSM-5.
Claim 18
Dependent Claim
11 words
The method described in claim 5 wherein said zeolite is ZSM-5.
Claim 19
Dependent Claim
11 words
The method described in claim 6 wherein said zeolite is ZSM-5.
Claim 20
Dependent Claim
11 words
The method described in claim 7 wherein said zeolite is ZSM-5.
Claim 21
Dependent Claim
11 words
The method described in claim 8 wherein said zeolite is ZSM-5.
Claim 22
Dependent Claim
11 words
The method described in claim 9 wherein said zeolite is ZSM-5.
Claim 23
Dependent Claim
11 words
The method described in claim 10 wherein said zeolite is ZSM-5.
Claim 24
Dependent Claim
11 words
The method described in claim 11 wherein said zeolite is ZSM-5.
Claim 25
Dependent Claim
53 words
The product produced by the method of claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 or 21 or 22 or 23.
Claim 26
Dependent Claim
23 words
The method described in claim 3 including the step of converting said zeolite to the alkali metal form prior to said contacting step.
Claim 27
Dependent Claim
32 words
The method described in claim 25 wherein said zeolite is ZSM-5, said alkali metal form is the sodium form, and said alkali metal zeolite is the sole source of alkali metal cation.
Claim 28
Dependent Claim
12 words
The product produced by the method described in claim 25 or 26.
Claim 29
Independent Claim
109 words
A method for increasing the cation-exchange capacity of a precursor zeolite having a silica to alumina ratio of at least 12, a Constraint Index of about 1 to 12, and a characteristic X-ray diffraction pattern, said method comprising: forming a physical mixture of said zeolite with a solid comprising alumina, said mixture containing about 10 to 90 parts by weight of said zeolite; contacting said mixture with liquid water and an activating amount of an alkali metal cation for less than about 1 hour to about 24 hours; and recovering a zeolite of increased cation-exchange capacity and with an X-ray diffraction pattern substantially the same as the precursor zeolite.
Claim 30
Independent Claim
109 words
A method for increasing the cation-exchange capacity of a precursor zeolite having a silica to alumina ratio of at least 12, a Constraint Index of about 1 to 12, and a characteristic X-ray diffraction pattern, said method comprising: forming a physical mixture of said zeolite with a solid comprising alumina, said mixture containing about 10 to 90 parts by weight of said zeolite; contacting said mixture with liquid water and an activating amount of an alkali metal cation for less than about 1 hour to about 24 hours; and recovering a zeolite of increased cation-exchange capacity and with an X-ray diffraction pattern substantially the same as the precursor zeolite.
References Cited (Backward Citations)
US4443554A
Cited
US4468475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |